See Linux commit 9300f00439743c4a34d735e1a27118eb68a1504e ("RISC-V: Add ptrace support for vectors").
@@ -703,6 +703,8 @@ typedef struct {
#define NT_MIPS_DSP 0x800
#define NT_MIPS_FP_MODE 0x801
#define NT_MIPS_MSA 0x802
+#define NT_RISCV_CSR 0x900
+#define NT_RISCV_VECTOR 0x901
#define NT_VERSION 1